feat(docker): Improve docker build and prevent double path in naming

[heliocastro]

• Push the image to spdx/ organiztion level, so removing the duplicated path
• Enable docker to be built manually or on pull requests for test, but push is only enabled on tagging
• Move artificial version delaration to maven proper solution
• Add multiarch build
• Upxate Maven to version 3.9 and base Java for version 21
• Pinned actions for docker based actions

[goneall]

Looks like the CI is failing with the following:

70.93 cp: cannot stat 'target/tools-java-268/merge-jar-with-dependencies.jar': No such file or directory
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WARNING: No output specified with docker-container driver. Build result will only remain in the build cache. To push result image into registry use --push or to load image into docker use --load
ERROR: failed to build: failed to solve: process "/bin/sh -c mvn clean org.jacoco:jacoco-maven-plugin:prepare-agent install     && mkdir -p /usr/lib/java/spdx     && cp target/tools-java-$TOOLS_JAVA_VERSION-jar-with-dependencies.jar /usr/lib/java/spdx/" did not complete successfully: exit code: 1
Reference
Check build summary support
Error: buildx failed with: ERROR: failed to build: failed to solve: process "/bin/sh -c mvn clean org.jacoco:jacoco-maven-plugin:prepare-agent install     && mkdir -p /usr/lib/java/spdx     && cp target/tools-java-$TOOLS_JAVA_VERSION-jar-with-dependencies.jar /usr/lib/java/spdx/" did not complete successfully: exit code: 1

[heliocastro]

Looks like the CI is failing with the following:

Still on draft, i'll finish now, as the daily coffee start to make effect :-)

[heliocastro]

@goneall We are good to go
I made more improvements than only push to spdx/tools-java.
When you tag a release, the push to main registry will happens and latest tag will be added automatically.
The build are a little slow now due multiarch image, it need build twice for amd64 and arm64, this is because the way docker build actions works unfortunately, but as java itself we could reuse it if not that.